* Patch by Peter Ryser, 20 Feb 2004:
Add support for the Xilinx ML300 platform
* Patch by Stephan Linz, 17 Feb 2004:
Fix watchdog support for NIOS
* Patch by Josh Fryman, 16 Feb 2004:
Fix byte-swapping for cfi_flash.c for different bus widths
* Patch by Jon Diekema, 14 Jeb 2004:
Remove duplicate "FPGA Support" notes from the README file
diff --git a/board/xilinx/xilinx_enet/xemac.c b/board/xilinx/xilinx_enet/xemac.c
new file mode 100644
index 0000000..48b4ede
--- /dev/null
+++ b/board/xilinx/xilinx_enet/xemac.c
@@ -0,0 +1,844 @@
+/******************************************************************************
+*
+* Author: Xilinx, Inc.
+*
+*
+* This program is free software; you can redistribute it and/or modify it
+* under the terms of the GNU General Public License as published by the
+* Free Software Foundation; either version 2 of the License, or (at your
+* option) any later version.
+*
+*
+* XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS" AS A
+* COURTESY TO YOU. BY PROVIDING THIS DESIGN, CODE, OR INFORMATION AS
+* ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE, APPLICATION OR STANDARD,
+* XILINX IS MAKING NO REPRESENTATION THAT THIS IMPLEMENTATION IS FREE
+* FROM ANY CLAIMS OF INFRINGEMENT, AND YOU ARE RESPONSIBLE FOR OBTAINING
+* ANY THIRD PARTY RIGHTS YOU MAY REQUIRE FOR YOUR IMPLEMENTATION.
+* XILINX EXPRESSLY DISCLAIMS ANY WARRANTY WHATSOEVER WITH RESPECT TO
+* THE ADEQUACY OF THE IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO ANY
+* WARRANTIES OR REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE FROM
+* CLAIMS OF INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY AND
+* FITNESS FOR A PARTICULAR PURPOSE.
+*
+*
+* Xilinx hardware products are not intended for use in life support
+* appliances, devices, or systems. Use in such applications is
+* expressly prohibited.
+*
+*
+* (c) Copyright 2002-2004 Xilinx Inc.
+* All rights reserved.
+*
+*
+* You should have received a copy of the GNU General Public License along
+* with this program; if not, write to the Free Software Foundation, Inc.,
+* 675 Mass Ave, Cambridge, MA 02139, USA.
+*
+******************************************************************************/
+/*****************************************************************************/
+/**
+*
+* @file xemac.c
+*
+* The XEmac driver. Functions in this file are the minimum required functions
+* for this driver. See xemac.h for a detailed description of the driver.
+*
+* <pre>
+* MODIFICATION HISTORY:
+*
+* Ver Who Date Changes
+* ----- ---- -------- -------------------------------------------------------
+* 1.00a rpm 07/31/01 First release
+* 1.00b rpm 02/20/02 Repartitioned files and functions
+* 1.00b rpm 07/23/02 Removed the PHY reset from Initialize()
+* 1.00b rmm 09/23/02 Removed commented code in Initialize(). Recycled as
+* XEmac_mPhyReset macro in xemac_l.h.
+* 1.00c rpm 12/05/02 New version includes support for simple DMA
+* 1.00c rpm 12/12/02 Changed location of IsStarted assignment in XEmac_Start
+* to be sure the flag is set before the device and
+* interrupts are enabled.
+* 1.00c rpm 02/03/03 SelfTest was not clearing polled mode. Take driver out
+* of polled mode in XEmac_Reset() to fix this problem.
+* 1.00c rmm 05/13/03 Fixed diab compiler warnings relating to asserts.
+* </pre>
+******************************************************************************/
+
+/***************************** Include Files *********************************/
+
+#include "xbasic_types.h"
+#include "xemac_i.h"
+#include "xio.h"
+#include "xipif_v1_23_b.h" /* Uses v1.23b of the IPIF */
+
+/************************** Constant Definitions *****************************/
+
+/**************************** Type Definitions *******************************/
+
+/***************** Macros (Inline Functions) Definitions *********************/
+
+/************************** Function Prototypes ******************************/
+
+static XStatus ConfigureDma(XEmac * InstancePtr);
+static XStatus ConfigureFifo(XEmac * InstancePtr);
+static void StubFifoHandler(void *CallBackRef);
+static void StubErrorHandler(void *CallBackRef, XStatus ErrorCode);
+static void StubSgHandler(void *CallBackRef, XBufDescriptor * BdPtr,
+ u32 NumBds);
+
+/************************** Variable Definitions *****************************/
+
+/*****************************************************************************/
+/**
+*
+* Initialize a specific XEmac instance/driver. The initialization entails:
+* - Initialize fields of the XEmac structure
+* - Clear the Ethernet statistics for this device
+* - Initialize the IPIF component with its register base address
+* - Configure the FIFO components with their register base addresses.
+* - If the device is configured with DMA, configure the DMA channel components
+* with their register base addresses. At some later time, memory pools for
+* the scatter-gather descriptor lists may be passed to the driver.
+* - Reset the Ethernet MAC
+*
+* @param InstancePtr is a pointer to the XEmac instance to be worked on.
+* @param DeviceId is the unique id of the device controlled by this XEmac
+* instance. Passing in a device id associates the generic XEmac
+* instance to a specific device, as chosen by the caller or application
+* developer.
+*
+* @return
+*
+* - XST_SUCCESS if initialization was successful
+* - XST_DEVICE_IS_STARTED if the device has already been started
+* - XST_DEVICE_NOT_FOUND if device configuration information was not found for
+* a device with the supplied device ID.
+*
+* @note
+*
+* None.
+*
+******************************************************************************/
+XStatus
+XEmac_Initialize(XEmac * InstancePtr, u16 DeviceId)
+{
+ XStatus Result;
+ XEmac_Config *ConfigPtr; /* configuration information */
+
+ XASSERT_NONVOID(InstancePtr != NULL);
+
+ /*
+ * If the device is started, disallow the initialize and return a status
+ * indicating it is started. This allows the user to stop the device
+ * and reinitialize, but prevents a user from inadvertently initializing
+ */
+ if (InstancePtr->IsStarted == XCOMPONENT_IS_STARTED) {
+ return XST_DEVICE_IS_STARTED;
+ }
+
+ /*
+ * Lookup the device configuration in the temporary CROM table. Use this
+ * configuration info down below when initializing this component.
+ */
+ ConfigPtr = XEmac_LookupConfig(DeviceId);
+ if (ConfigPtr == NULL) {
+ return XST_DEVICE_NOT_FOUND;
+ }
+
+ /*
+ * Set some default values
+ */
+ InstancePtr->IsReady = 0;
+ InstancePtr->IsStarted = 0;
+ InstancePtr->IpIfDmaConfig = ConfigPtr->IpIfDmaConfig;
+ InstancePtr->HasMii = ConfigPtr->HasMii;
+ InstancePtr->HasMulticastHash = FALSE;
+
+ /* Always default polled to false, let user configure this mode */
+ InstancePtr->IsPolled = FALSE;
+ InstancePtr->FifoRecvHandler = StubFifoHandler;
+ InstancePtr->FifoSendHandler = StubFifoHandler;
+ InstancePtr->ErrorHandler = StubErrorHandler;
+ InstancePtr->SgRecvHandler = StubSgHandler;
+ InstancePtr->SgSendHandler = StubSgHandler;
+
+ /*
+ * Clear the statistics for this driver
+ */
+ XEmac_mClearStruct((u8 *) & InstancePtr->Stats, sizeof (XEmac_Stats));
+
+ /*
+ * Initialize the device register base addresses
+ */
+ InstancePtr->BaseAddress = ConfigPtr->BaseAddress;
+
+ /*
+ * Configure the send and receive FIFOs in the MAC
+ */
+ Result = ConfigureFifo(InstancePtr);
+ if (Result != XST_SUCCESS) {
+ return Result;
+ }
+
+ /*
+ * If the device is configured for DMA, configure the send and receive DMA
+ * channels in the MAC.
+ */
+ if (XEmac_mIsDma(InstancePtr)) {
+ Result = ConfigureDma(InstancePtr);
+ if (Result != XST_SUCCESS) {
+ return Result;
+ }
+ }
+
+ /*
+ * Indicate the component is now ready to use. Note that this is done before
+ * we reset the device and the PHY below, which may seem a bit odd. The
+ * choice was made to move it here rather than remove the asserts in various
+ * functions (e.g., Reset() and all functions that it calls). Applications
+ * that use multiple threads, one to initialize the XEmac driver and one
+ * waiting on the IsReady condition could have a problem with this sequence.
+ */
+ InstancePtr->IsReady = XCOMPONENT_IS_READY;
+
+ /*
+ * Reset the MAC to get it into its initial state. It is expected that
+ * device configuration by the user will take place after this
+ * initialization is done, but before the device is started.
+ */
+ XEmac_Reset(InstancePtr);
+
+ return XST_SUCCESS;
+}
+
+/*****************************************************************************/
+/**
+*
+* Start the Ethernet controller as follows:
+* - If not in polled mode
+* - Set the internal interrupt enable registers appropriately
+* - Enable interrupts within the device itself. Note that connection of
+* the driver's interrupt handler to the interrupt source (typically
+* done using the interrupt controller component) is done by the higher
+* layer software.
+* - If the device is configured with scatter-gather DMA, start the DMA
+* channels if the descriptor lists are not empty
+* - Enable the transmitter
+* - Enable the receiver
+*
+* The PHY is enabled after driver initialization. We assume the upper layer
+* software has configured it and the EMAC appropriately before this function
+* is called.
+*
+* @param InstancePtr is a pointer to the XEmac instance to be worked on.
+*
+* @return
+*
+* - XST_SUCCESS if the device was started successfully
+* - XST_NO_CALLBACK if a callback function has not yet been registered using
+* the SetxxxHandler function. This is required if in interrupt mode.
+* - XST_DEVICE_IS_STARTED if the device is already started
+* - XST_DMA_SG_NO_LIST if configured for scatter-gather DMA and a descriptor
+* list has not yet been created for the send or receive channel.
+*
+* @note
+*
+* The driver tries to match the hardware configuration. So if the hardware
+* is configured with scatter-gather DMA, the driver expects to start the
+* scatter-gather channels and expects that the user has set up the buffer
+* descriptor lists already. If the user expects to use the driver in a mode
+* different than how the hardware is configured, the user should modify the
+* configuration table to reflect the mode to be used. Modifying the config
+* table is a workaround for now until we get some experience with how users
+* are intending to use the hardware in its different configurations. For
+* example, if the hardware is built with scatter-gather DMA but the user is
+* intending to use only simple DMA, the user either needs to modify the config
+* table as a workaround or rebuild the hardware with only simple DMA.
+*
+* This function makes use of internal resources that are shared between the
+* Start, Stop, and SetOptions functions. So if one task might be setting device
+* options while another is trying to start the device, the user is required to
+* provide protection of this shared data (typically using a semaphore).
+*
+******************************************************************************/
+XStatus
+XEmac_Start(XEmac * InstancePtr)
+{
+ u32 ControlReg;
+ XStatus Result;
+
+ XASSERT_NONVOID(InstancePtr != NULL);
+ XASSERT_NONVOID(InstancePtr->IsReady == XCOMPONENT_IS_READY);
+
+ /*
+ * If it is already started, return a status indicating so
+ */
+ if (InstancePtr->IsStarted == XCOMPONENT_IS_STARTED) {
+ return XST_DEVICE_IS_STARTED;
+ }
+
+ /*
+ * If not polled, enable interrupts
+ */
+ if (!InstancePtr->IsPolled) {
+ /*
+ * Verify that the callbacks have been registered, then enable
+ * interrupts
+ */
+ if (XEmac_mIsSgDma(InstancePtr)) {
+ if ((InstancePtr->SgRecvHandler == StubSgHandler) ||
+ (InstancePtr->SgSendHandler == StubSgHandler)) {
+ return XST_NO_CALLBACK;
+ }
+
+ /* Enable IPIF interrupts */
+ XIIF_V123B_WRITE_DIER(InstancePtr->BaseAddress,
+ XEM_IPIF_DMA_DFT_MASK |
+ XIIF_V123B_ERROR_MASK);
+ XIIF_V123B_WRITE_IIER(InstancePtr->BaseAddress,
+ XEM_EIR_DFT_SG_MASK);
+
+ /* Enable scatter-gather DMA interrupts */
+ XDmaChannel_SetIntrEnable(&InstancePtr->RecvChannel,
+ XEM_DMA_SG_INTR_MASK);
+ XDmaChannel_SetIntrEnable(&InstancePtr->SendChannel,
+ XEM_DMA_SG_INTR_MASK);
+ } else {
+ if ((InstancePtr->FifoRecvHandler == StubFifoHandler) ||
+ (InstancePtr->FifoSendHandler == StubFifoHandler)) {
+ return XST_NO_CALLBACK;
+ }
+
+ /* Enable IPIF interrupts (used by simple DMA also) */
+ XIIF_V123B_WRITE_DIER(InstancePtr->BaseAddress,
+ XEM_IPIF_FIFO_DFT_MASK |
+ XIIF_V123B_ERROR_MASK);
+ XIIF_V123B_WRITE_IIER(InstancePtr->BaseAddress,
+ XEM_EIR_DFT_FIFO_MASK);
+ }
+
+ /* Enable the global IPIF interrupt output */
+ XIIF_V123B_GINTR_ENABLE(InstancePtr->BaseAddress);
+ }
+
+ /*
+ * Indicate that the device is started before we enable the transmitter
+ * or receiver. This needs to be done before because as soon as the
+ * receiver is enabled we may get an interrupt, and there are functions
+ * in the interrupt handling path that rely on the IsStarted flag.
+ */
+ InstancePtr->IsStarted = XCOMPONENT_IS_STARTED;
+
+ /*
+ * Enable the transmitter, and receiver (do a read/modify/write to preserve
+ * current settings). There is no critical section here since this register
+ * is not modified during interrupt context.
+ */
+ ControlReg = XIo_In32(InstancePtr->BaseAddress + XEM_ECR_OFFSET);
+ ControlReg &= ~(XEM_ECR_XMIT_RESET_MASK | XEM_ECR_RECV_RESET_MASK);
+ ControlReg |= (XEM_ECR_XMIT_ENABLE_MASK | XEM_ECR_RECV_ENABLE_MASK);
+
+ XIo_Out32(InstancePtr->BaseAddress + XEM_ECR_OFFSET, ControlReg);
+
+ /*
+ * If configured with scatter-gather DMA and not polled, restart the
+ * DMA channels in case there are buffers ready to be sent or received into.
+ * The DMA SgStart function uses data that can be modified during interrupt
+ * context, so a critical section is required here.
+ */
+ if ((XEmac_mIsSgDma(InstancePtr)) && (!InstancePtr->IsPolled)) {
+ XIIF_V123B_GINTR_DISABLE(InstancePtr->BaseAddress);
+
+ /*
+ * The only error we care about is if the list has not yet been
+ * created, or on receive, if no buffer descriptors have been
+ * added yet (the list is empty). Other errors are benign at this point.
+ */
+ Result = XDmaChannel_SgStart(&InstancePtr->RecvChannel);
+ if ((Result == XST_DMA_SG_NO_LIST)
+ || (Result == XST_DMA_SG_LIST_EMPTY)) {
+ XIIF_V123B_GINTR_ENABLE(InstancePtr->BaseAddress);
+ return Result;
+ }
+
+ Result = XDmaChannel_SgStart(&InstancePtr->SendChannel);
+ if (Result == XST_DMA_SG_NO_LIST) {
+ XIIF_V123B_GINTR_ENABLE(InstancePtr->BaseAddress);
+ return Result;
+ }
+
+ XIIF_V123B_GINTR_ENABLE(InstancePtr->BaseAddress);
+ }
+
+ return XST_SUCCESS;
+}
+
+/*****************************************************************************/
+/**
+*
+* Stop the Ethernet MAC as follows:
+* - If the device is configured with scatter-gather DMA, stop the DMA
+* channels (wait for acknowledgment of stop)
+* - Disable the transmitter and receiver
+* - Disable interrupts if not in polled mode (the higher layer software is
+* responsible for disabling interrupts at the interrupt controller)
+*
+* The PHY is left enabled after a Stop is called.
+*
+* If the device is configured for scatter-gather DMA, the DMA engine stops at
+* the next buffer descriptor in its list. The remaining descriptors in the list
+* are not removed, so anything in the list will be transmitted or received when
+* the device is restarted. The side effect of doing this is that the last
+* buffer descriptor processed by the DMA engine before stopping may not be the
+* last descriptor in the Ethernet frame. So when the device is restarted, a
+* partial frame (i.e., a bad frame) may be transmitted/received. This is only a
+* concern if a frame can span multiple buffer descriptors, which is dependent
+* on the size of the network buffers.
+*
+* @param InstancePtr is a pointer to the XEmac instance to be worked on.
+*
+* @return
+*
+* - XST_SUCCESS if the device was stopped successfully
+* - XST_DEVICE_IS_STOPPED if the device is already stopped
+*
+* @note
+*
+* This function makes use of internal resources that are shared between the
+* Start, Stop, and SetOptions functions. So if one task might be setting device
+* options while another is trying to start the device, the user is required to
+* provide protection of this shared data (typically using a semaphore).
+*
+******************************************************************************/
+XStatus
+XEmac_Stop(XEmac * InstancePtr)
+{
+ u32 ControlReg;
+
+ XASSERT_NONVOID(InstancePtr != NULL);
+ XASSERT_NONVOID(InstancePtr->IsReady == XCOMPONENT_IS_READY);
+
+ /*
+ * If the device is already stopped, do nothing but return a status
+ * indicating so
+ */
+ if (InstancePtr->IsStarted != XCOMPONENT_IS_STARTED) {
+ return XST_DEVICE_IS_STOPPED;
+ }
+
+ /*
+ * If configured for scatter-gather DMA, stop the DMA channels. Ignore
+ * the XST_DMA_SG_IS_STOPPED return code. There is a critical section
+ * here between SgStart and SgStop, and SgStart can be called in interrupt
+ * context, so disable interrupts while calling SgStop.
+ */
+ if (XEmac_mIsSgDma(InstancePtr)) {
+ XBufDescriptor *BdTemp; /* temporary descriptor pointer */
+
+ XIIF_V123B_GINTR_DISABLE(InstancePtr->BaseAddress);
+
+ (void) XDmaChannel_SgStop(&InstancePtr->SendChannel, &BdTemp);
+ (void) XDmaChannel_SgStop(&InstancePtr->RecvChannel, &BdTemp);
+
+ XIIF_V123B_GINTR_ENABLE(InstancePtr->BaseAddress);
+ }
+
+ /*
+ * Disable the transmitter and receiver. There is no critical section
+ * here since this register is not modified during interrupt context.
+ */
+ ControlReg = XIo_In32(InstancePtr->BaseAddress + XEM_ECR_OFFSET);
+ ControlReg &= ~(XEM_ECR_XMIT_ENABLE_MASK | XEM_ECR_RECV_ENABLE_MASK);
+ XIo_Out32(InstancePtr->BaseAddress + XEM_ECR_OFFSET, ControlReg);
+
+ /*
+ * If not in polled mode, disable interrupts for IPIF (includes MAC and
+ * DMAs)
+ */
+ if (!InstancePtr->IsPolled) {
+ XIIF_V123B_GINTR_DISABLE(InstancePtr->BaseAddress);
+ }
+
+ InstancePtr->IsStarted = 0;
+
+ return XST_SUCCESS;
+}
+
+/*****************************************************************************/
+/**
+*
+* Reset the Ethernet MAC. This is a graceful reset in that the device is stopped
+* first. Resets the DMA channels, the FIFOs, the transmitter, and the receiver.
+* The PHY is not reset. Any frames in the scatter-gather descriptor lists will
+* remain in the lists. The side effect of doing this is that after a reset and
+* following a restart of the device, frames that were in the list before the
+* reset may be transmitted or received. Reset must only be called after the
+* driver has been initialized.
+*
+* The driver is also taken out of polled mode if polled mode was set. The user
+* is responsbile for re-configuring the driver into polled mode after the
+* reset if desired.
+*
+* The configuration after this reset is as follows:
+* - Half duplex
+* - Disabled transmitter and receiver
+* - Enabled PHY (the PHY is not reset)
+* - MAC transmitter does pad insertion, FCS insertion, and source address
+* overwrite.
+* - MAC receiver does not strip padding or FCS
+* - Interframe Gap as recommended by IEEE Std. 802.3 (96 bit times)
+* - Unicast addressing enabled
+* - Broadcast addressing enabled
+* - Multicast addressing disabled (addresses are preserved)
+* - Promiscuous addressing disabled
+* - Default packet threshold and packet wait bound register values for
+* scatter-gather DMA operation
+* - MAC address of all zeros
+* - Non-polled mode
+*
+* The upper layer software is responsible for re-configuring (if necessary)
+* and restarting the MAC after the reset. Note that the PHY is not reset. PHY
+* control is left to the upper layer software. Note also that driver statistics
+* are not cleared on reset. It is up to the upper layer software to clear the
+* statistics if needed.
+*
+* When a reset is required due to an internal error, the driver notifies the
+* upper layer software of this need through the ErrorHandler callback and
+* specific status codes. The upper layer software is responsible for calling
+* this Reset function and then re-configuring the device.
+*
+* @param InstancePtr is a pointer to the XEmac instance to be worked on.
+*
+* @return
+*
+* None.
+*
+* @note
+*
+* None.
+*
+* @internal
+*
+* The reset is accomplished by setting the IPIF reset register. This takes
+* care of resetting all hardware blocks, including the MAC.
+*
+******************************************************************************/
+void
+XEmac_Reset(XEmac * InstancePtr)
+{
+ XASSERT_VOID(InstancePtr != NULL);
+ XASSERT_VOID(InstancePtr->IsReady == XCOMPONENT_IS_READY);
+
+ /*
+ * Stop the device first
+ */
+ (void) XEmac_Stop(InstancePtr);
+
+ /*
+ * Take the driver out of polled mode
+ */
+ InstancePtr->IsPolled = FALSE;
+
+ /*
+ * Reset the entire IPIF at once. If we choose someday to reset each
+ * hardware block separately, the reset should occur in the direction of
+ * data flow. For example, for the send direction the reset order is DMA
+ * first, then FIFO, then the MAC transmitter.
+ */
+ XIIF_V123B_RESET(InstancePtr->BaseAddress);
+
+ if (XEmac_mIsSgDma(InstancePtr)) {
+ /*
+ * After reset, configure the scatter-gather DMA packet threshold and
+ * packet wait bound registers to default values. Ignore the return
+ * values of these functions since they only return error if the device
+ * is not stopped.
+ */
+ (void) XEmac_SetPktThreshold(InstancePtr, XEM_SEND,
+ XEM_SGDMA_DFT_THRESHOLD);
+ (void) XEmac_SetPktThreshold(InstancePtr, XEM_RECV,
+ XEM_SGDMA_DFT_THRESHOLD);
+ (void) XEmac_SetPktWaitBound(InstancePtr, XEM_SEND,
+ XEM_SGDMA_DFT_WAITBOUND);
+ (void) XEmac_SetPktWaitBound(InstancePtr, XEM_RECV,
+ XEM_SGDMA_DFT_WAITBOUND);
+ }
+}
+
+/*****************************************************************************/
+/**
+*
+* Set the MAC address for this driver/device. The address is a 48-bit value.
+* The device must be stopped before calling this function.
+*
+* @param InstancePtr is a pointer to the XEmac instance to be worked on.
+* @param AddressPtr is a pointer to a 6-byte MAC address.
+*
+* @return
+*
+* - XST_SUCCESS if the MAC address was set successfully
+* - XST_DEVICE_IS_STARTED if the device has not yet been stopped
+*
+* @note
+*
+* None.
+*
+******************************************************************************/
+XStatus
+XEmac_SetMacAddress(XEmac * InstancePtr, u8 * AddressPtr)
+{
+ u32 MacAddr = 0;
+
+ XASSERT_NONVOID(InstancePtr != NULL);
+ XASSERT_NONVOID(AddressPtr != NULL);
+ XASSERT_NONVOID(InstancePtr->IsReady == XCOMPONENT_IS_READY);
+
+ /*
+ * The device must be stopped before setting the MAC address
+ */
+ if (InstancePtr->IsStarted == XCOMPONENT_IS_STARTED) {
+ return XST_DEVICE_IS_STARTED;
+ }
+
+ /*
+ * Set the device station address high and low registers
+ */
+ MacAddr = (AddressPtr[0] << 8) | AddressPtr[1];
+ XIo_Out32(InstancePtr->BaseAddress + XEM_SAH_OFFSET, MacAddr);
+
+ MacAddr = (AddressPtr[2] << 24) | (AddressPtr[3] << 16) |
+ (AddressPtr[4] << 8) | AddressPtr[5];
+
+ XIo_Out32(InstancePtr->BaseAddress + XEM_SAL_OFFSET, MacAddr);
+
+ return XST_SUCCESS;
+}
+
+/*****************************************************************************/
+/**
+*
+* Get the MAC address for this driver/device.
+*
+* @param InstancePtr is a pointer to the XEmac instance to be worked on.
+* @param BufferPtr is an output parameter, and is a pointer to a buffer into
+* which the current MAC address will be copied. The buffer must be at
+* least 6 bytes.
+*
+* @return
+*
+* None.
+*
+* @note
+*
+* None.
+*
+******************************************************************************/
+void
+XEmac_GetMacAddress(XEmac * InstancePtr, u8 * BufferPtr)
+{
+ u32 MacAddrHi;
+ u32 MacAddrLo;
+
+ XASSERT_VOID(InstancePtr != NULL);
+ XASSERT_VOID(BufferPtr != NULL);
+ XASSERT_VOID(InstancePtr->IsReady == XCOMPONENT_IS_READY);
+
+ MacAddrHi = XIo_In32(InstancePtr->BaseAddress + XEM_SAH_OFFSET);
+ MacAddrLo = XIo_In32(InstancePtr->BaseAddress + XEM_SAL_OFFSET);
+
+ BufferPtr[0] = (u8) (MacAddrHi >> 8);
+ BufferPtr[1] = (u8) MacAddrHi;
+ BufferPtr[2] = (u8) (MacAddrLo >> 24);
+ BufferPtr[3] = (u8) (MacAddrLo >> 16);
+ BufferPtr[4] = (u8) (MacAddrLo >> 8);
+ BufferPtr[5] = (u8) MacAddrLo;
+}
+
+/******************************************************************************/
+/**
+*
+* Configure DMA capabilities.
+*
+* @param InstancePtr is a pointer to the XEmac instance to be worked on.
+*
+* @return
+*
+* - XST_SUCCESS if successful initialization of DMA
+*
+* @note
+*
+* None.
+*
+******************************************************************************/
+static XStatus
+ConfigureDma(XEmac * InstancePtr)
+{
+ XStatus Result;
+
+ /*
+ * Initialize the DMA channels with their base addresses. We assume
+ * scatter-gather DMA is the only possible configuration. Descriptor space
+ * will need to be set later by the upper layer.
+ */
+ Result = XDmaChannel_Initialize(&InstancePtr->RecvChannel,
+ InstancePtr->BaseAddress +
+ XEM_DMA_RECV_OFFSET);
+ if (Result != XST_SUCCESS) {
+ return Result;
+ }
+
+ Result = XDmaChannel_Initialize(&InstancePtr->SendChannel,
+ InstancePtr->BaseAddress +
+ XEM_DMA_SEND_OFFSET);
+
+ return Result;
+}
+
+/******************************************************************************/
+/**
+*
+* Configure the send and receive FIFO components with their base addresses
+* and interrupt masks. Currently the base addresses are defined constants.
+*
+* @param InstancePtr is a pointer to the XEmac instance to be worked on.
+*
+* @return
+*
+* XST_SUCCESS if successful initialization of the packet FIFOs
+*
+* @note
+*
+* None.
+*
+******************************************************************************/
+static XStatus
+ConfigureFifo(XEmac * InstancePtr)
+{
+ XStatus Result;
+
+ /*
+ * Return status from the packet FIFOs initialization is ignored since
+ * they always return success.
+ */
+ Result = XPacketFifoV100b_Initialize(&InstancePtr->RecvFifo,
+ InstancePtr->BaseAddress +
+ XEM_PFIFO_RXREG_OFFSET,
+ InstancePtr->BaseAddress +
+ XEM_PFIFO_RXDATA_OFFSET);
+ if (Result != XST_SUCCESS) {
+ return Result;
+ }
+
+ Result = XPacketFifoV100b_Initialize(&InstancePtr->SendFifo,
+ InstancePtr->BaseAddress +
+ XEM_PFIFO_TXREG_OFFSET,
+ InstancePtr->BaseAddress +
+ XEM_PFIFO_TXDATA_OFFSET);
+ return Result;
+}
+
+/******************************************************************************/
+/**
+*
+* This is a stub for the scatter-gather send and recv callbacks. The stub
+* is here in case the upper layers forget to set the handlers.
+*
+* @param CallBackRef is a pointer to the upper layer callback reference
+* @param BdPtr is a pointer to the first buffer descriptor in a list
+* @param NumBds is the number of descriptors in the list.
+*
+* @return
+*
+* None.
+*
+* @note
+*
+* None.
+*
+******************************************************************************/
+static void
+StubSgHandler(void *CallBackRef, XBufDescriptor * BdPtr, u32 NumBds)
+{
+ XASSERT_VOID_ALWAYS();
+}
+
+/******************************************************************************/
+/**
+*
+* This is a stub for the non-DMA send and recv callbacks. The stub is here in
+* case the upper layers forget to set the handlers.
+*
+* @param CallBackRef is a pointer to the upper layer callback reference
+*
+* @return
+*
+* None.
+*
+* @note
+*
+* None.
+*
+******************************************************************************/
+static void
+StubFifoHandler(void *CallBackRef)
+{
+ XASSERT_VOID_ALWAYS();
+}
+
+/******************************************************************************/
+/**
+*
+* This is a stub for the asynchronous error callback. The stub is here in
+* case the upper layers forget to set the handler.
+*
+* @param CallBackRef is a pointer to the upper layer callback reference
+* @param ErrorCode is the Xilinx error code, indicating the cause of the error
+*
+* @return
+*
+* None.
+*
+* @note
+*
+* None.
+*
+******************************************************************************/
+static void
+StubErrorHandler(void *CallBackRef, XStatus ErrorCode)
+{
+ XASSERT_VOID_ALWAYS();
+}
+
+/*****************************************************************************/
+/**
+*
+* Lookup the device configuration based on the unique device ID. The table
+* EmacConfigTable contains the configuration info for each device in the system.
+*
+* @param DeviceId is the unique device ID of the device being looked up.
+*
+* @return
+*
+* A pointer to the configuration table entry corresponding to the given
+* device ID, or NULL if no match is found.
+*
+* @note
+*
+* None.
+*
+******************************************************************************/
+XEmac_Config *
+XEmac_LookupConfig(u16 DeviceId)
+{
+ XEmac_Config *CfgPtr = NULL;
+ int i;
+
+ for (i = 0; i < XPAR_XEMAC_NUM_INSTANCES; i++) {
+ if (XEmac_ConfigTable[i].DeviceId == DeviceId) {
+ CfgPtr = &XEmac_ConfigTable[i];
+ break;
+ }
+ }
+
+ return CfgPtr;
+}